1 // SPDX-License-Identifier: GPL-2.0+ 2 // 3 // AMD Renoir ACP PCI Driver 4 // 5 //Copyright 2020 Advanced Micro Devices, Inc. 6 7 #include <linux/pci.h> 8 #include <linux/acpi.h> 9 #include <linux/dmi.h> 10 #include <linux/module.h> 11 #include <linux/io.h> 12 #include <linux/delay.h> 13 #include <linux/platform_device.h> 14 #include <linux/interrupt.h> 15 #include <linux/pm_runtime.h> 16 17 #include "rn_acp3x.h" 18 19 static int acp_power_gating; 20 module_param(acp_power_gating, int, 0644); 21 MODULE_PARM_DESC(acp_power_gating, "Enable acp power gating"); 22 23 /** 24 * dmic_acpi_check = -1 - Use ACPI/DMI method to detect the DMIC hardware presence at runtime 25 * = 0 - Skip the DMIC device creation and return probe failure 26 * = 1 - Force DMIC support 27 */ 28 static int dmic_acpi_check = ACP_DMIC_AUTO; 29 module_param(dmic_acpi_check, bint, 0644); 30 MODULE_PARM_DESC(dmic_acpi_check, "Digital microphone presence (-1=auto, 0=none, 1=force)"); 31 32 struct acp_dev_data { 33 void __iomem *acp_base; 34 struct resource *res; 35 struct platform_device *pdev[ACP_DEVS]; 36 }; 37 38 static int rn_acp_power_on(void __iomem *acp_base) 39 { 40 u32 val; 41 int timeout; 42 43 val = rn_readl(acp_base + ACP_PGFSM_STATUS); 44 45 if (val == 0) 46 return val; 47 48 if ((val & ACP_PGFSM_STATUS_MASK) != 49 ACP_POWER_ON_IN_PROGRESS) 50 rn_writel(ACP_PGFSM_CNTL_POWER_ON_MASK, 51 acp_base + ACP_PGFSM_CONTROL); 52 timeout = 0; 53 while (++timeout < 500) { 54 val = rn_readl(acp_base + ACP_PGFSM_STATUS); 55 if (!val) 56 return 0; 57 udelay(1); 58 } 59 return -ETIMEDOUT; 60 } 61 62 static int rn_acp_power_off(void __iomem *acp_base) 63 { 64 u32 val; 65 int timeout; 66 67 rn_writel(ACP_PGFSM_CNTL_POWER_OFF_MASK, 68 acp_base + ACP_PGFSM_CONTROL); 69 timeout = 0; 70 while (++timeout < 500) { 71 val = rn_readl(acp_base + ACP_PGFSM_STATUS); 72 if ((val & ACP_PGFSM_STATUS_MASK) == ACP_POWERED_OFF) 73 return 0; 74 udelay(1); 75 } 76 return -ETIMEDOUT; 77 } 78 79 static int rn_acp_reset(void __iomem *acp_base) 80 { 81 u32 val; 82 int timeout; 83 84 rn_writel(1, acp_base + ACP_SOFT_RESET); 85 timeout = 0; 86 while (++timeout < 500) { 87 val = rn_readl(acp_base + ACP_SOFT_RESET); 88 if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK) 89 break; 90 cpu_relax(); 91 } 92 rn_writel(0, acp_base + ACP_SOFT_RESET); 93 timeout = 0; 94 while (++timeout < 500) { 95 val = rn_readl(acp_base + ACP_SOFT_RESET); 96 if (!val) 97 return 0; 98 cpu_relax(); 99 } 100 return -ETIMEDOUT; 101 } 102 103 static void rn_acp_enable_interrupts(void __iomem *acp_base) 104 { 105 u32 ext_intr_ctrl; 106 107 rn_writel(0x01, acp_base + ACP_EXTERNAL_INTR_ENB); 108 ext_intr_ctrl = rn_readl(acp_base + ACP_EXTERNAL_INTR_CNTL); 109 ext_intr_ctrl |= ACP_ERROR_MASK; 110 rn_writel(ext_intr_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL); 111 } 112 113 static void rn_acp_disable_interrupts(void __iomem *acp_base) 114 { 115 rn_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp_base + 116 ACP_EXTERNAL_INTR_STAT); 117 rn_writel(0x00, acp_base + ACP_EXTERNAL_INTR_ENB); 118 } 119 120 static int rn_acp_init(void __iomem *acp_base) 121 { 122 int ret; 123 124 /* power on */ 125 ret = rn_acp_power_on(acp_base); 126 if (ret) { 127 pr_err("ACP power on failed\n"); 128 return ret; 129 } 130 rn_writel(0x01, acp_base + ACP_CONTROL); 131 /* Reset */ 132 ret = rn_acp_reset(acp_base); 133 if (ret) { 134 pr_err("ACP reset failed\n"); 135 return ret; 136 } 137 rn_writel(0x03, acp_base + ACP_CLKMUX_SEL); 138 rn_acp_enable_interrupts(acp_base); 139 return 0; 140 } 141 142 static int rn_acp_deinit(void __iomem *acp_base) 143 { 144 int ret; 145 146 rn_acp_disable_interrupts(acp_base); 147 /* Reset */ 148 ret = rn_acp_reset(acp_base); 149 if (ret) { 150 pr_err("ACP reset failed\n"); 151 return ret; 152 } 153 rn_writel(0x00, acp_base + ACP_CLKMUX_SEL); 154 rn_writel(0x00, acp_base + ACP_CONTROL); 155 /* power off */ 156 if (acp_power_gating) { 157 ret = rn_acp_power_off(acp_base); 158 if (ret) { 159 pr_err("ACP power off failed\n"); 160 return ret; 161 } 162 } 163 return 0; 164 } 165 166 static const struct dmi_system_id rn_acp_quirk_table[] = { 167 { 168 /* Lenovo IdeaPad Flex 5 14ARE05, IdeaPad 5 15ARE05 */ 169 .matches = { 170 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "LENOVO"), 171 DMI_EXACT_MATCH(DMI_BOARD_NAME, "LNVNB161216"), 172 } 173 }, 174 {} 175 }; 176 177 static int snd_rn_acp_probe(struct pci_dev *pci, 178 const struct pci_device_id *pci_id) 179 { 180 struct acp_dev_data *adata; 181 struct platform_device_info pdevinfo[ACP_DEVS]; 182 #if defined(CONFIG_ACPI) 183 acpi_handle handle; 184 acpi_integer dmic_status; 185 #endif 186 const struct dmi_system_id *dmi_id; 187 unsigned int irqflags; 188 int ret, index; 189 u32 addr; 190 191 /* Renoir device check */ 192 if (pci->revision != 0x01) 193 return -ENODEV; 194 195 if (pci_enable_device(pci)) { 196 dev_err(&pci->dev, "pci_enable_device failed\n"); 197 return -ENODEV; 198 } 199 200 ret = pci_request_regions(pci, "AMD ACP3x audio"); 201 if (ret < 0) { 202 dev_err(&pci->dev, "pci_request_regions failed\n"); 203 goto disable_pci; 204 } 205 206 adata = devm_kzalloc(&pci->dev, sizeof(struct acp_dev_data), 207 GFP_KERNEL); 208 if (!adata) { 209 ret = -ENOMEM; 210 goto release_regions; 211 } 212 213 /* check for msi interrupt support */ 214 ret = pci_enable_msi(pci); 215 if (ret) 216 /* msi is not enabled */ 217 irqflags = IRQF_SHARED; 218 else 219 /* msi is enabled */ 220 irqflags = 0; 221 222 addr = pci_resource_start(pci, 0); 223 adata->acp_base = devm_ioremap(&pci->dev, addr, 224 pci_resource_len(pci, 0)); 225 if (!adata->acp_base) { 226 ret = -ENOMEM; 227 goto disable_msi; 228 } 229 pci_set_master(pci); 230 pci_set_drvdata(pci, adata); 231 ret = rn_acp_init(adata->acp_base); 232 if (ret) 233 goto disable_msi; 234 235 if (!dmic_acpi_check) { 236 ret = -ENODEV; 237 goto de_init; 238 } else if (dmic_acpi_check == ACP_DMIC_AUTO) { 239 #if defined(CONFIG_ACPI) 240 handle = ACPI_HANDLE(&pci->dev); 241 ret = acpi_evaluate_integer(handle, "_WOV", NULL, &dmic_status); 242 if (ACPI_FAILURE(ret)) { 243 ret = -ENODEV; 244 goto de_init; 245 } 246 if (!dmic_status) { 247 ret = -ENODEV; 248 goto de_init; 249 } 250 #endif 251 dmi_id = dmi_first_match(rn_acp_quirk_table); 252 if (dmi_id && !dmi_id->driver_data) { 253 dev_info(&pci->dev, "ACPI settings override using DMI (ACP mic is not present)"); 254 ret = -ENODEV; 255 goto de_init; 256 } 257 } 258 259 adata->res = devm_kzalloc(&pci->dev, 260 sizeof(struct resource) * 2, 261 GFP_KERNEL); 262 if (!adata->res) { 263 ret = -ENOMEM; 264 goto de_init; 265 } 266 267 adata->res[0].name = "acp_pdm_iomem"; 268 adata->res[0].flags = IORESOURCE_MEM; 269 adata->res[0].start = addr; 270 adata->res[0].end = addr + (ACP_REG_END - ACP_REG_START); 271 adata->res[1].name = "acp_pdm_irq"; 272 adata->res[1].flags = IORESOURCE_IRQ; 273 adata->res[1].start = pci->irq; 274 adata->res[1].end = pci->irq; 275 276 memset(&pdevinfo, 0, sizeof(pdevinfo)); 277 pdevinfo[0].name = "acp_rn_pdm_dma"; 278 pdevinfo[0].id = 0; 279 pdevinfo[0].parent = &pci->dev; 280 pdevinfo[0].num_res = 2; 281 pdevinfo[0].res = adata->res; 282 pdevinfo[0].data = &irqflags; 283 pdevinfo[0].size_data = sizeof(irqflags); 284 285 pdevinfo[1].name = "dmic-codec"; 286 pdevinfo[1].id = 0; 287 pdevinfo[1].parent = &pci->dev; 288 pdevinfo[2].name = "acp_pdm_mach"; 289 pdevinfo[2].id = 0; 290 pdevinfo[2].parent = &pci->dev; 291 for (index = 0; index < ACP_DEVS; index++) { 292 adata->pdev[index] = 293 platform_device_register_full(&pdevinfo[index]); 294 if (IS_ERR(adata->pdev[index])) { 295 dev_err(&pci->dev, "cannot register %s device\n", 296 pdevinfo[index].name); 297 ret = PTR_ERR(adata->pdev[index]); 298 goto unregister_devs; 299 } 300 } 301 pm_runtime_set_autosuspend_delay(&pci->dev, ACP_SUSPEND_DELAY_MS); 302 pm_runtime_use_autosuspend(&pci->dev); 303 pm_runtime_put_noidle(&pci->dev); 304 pm_runtime_allow(&pci->dev); 305 return 0; 306 307 unregister_devs: 308 for (index = 0; index < ACP_DEVS; index++) 309 platform_device_unregister(adata->pdev[index]); 310 de_init: 311 if (rn_acp_deinit(adata->acp_base)) 312 dev_err(&pci->dev, "ACP de-init failed\n"); 313 disable_msi: 314 pci_disable_msi(pci); 315 release_regions: 316 pci_release_regions(pci); 317 disable_pci: 318 pci_disable_device(pci); 319 320 return ret; 321 } 322 323 static int snd_rn_acp_suspend(struct device *dev) 324 { 325 int ret; 326 struct acp_dev_data *adata; 327 328 adata = dev_get_drvdata(dev); 329 ret = rn_acp_deinit(adata->acp_base); 330 if (ret) 331 dev_err(dev, "ACP de-init failed\n"); 332 else 333 dev_dbg(dev, "ACP de-initialized\n"); 334 335 return ret; 336 } 337 338 static int snd_rn_acp_resume(struct device *dev) 339 { 340 int ret; 341 struct acp_dev_data *adata; 342 343 adata = dev_get_drvdata(dev); 344 ret = rn_acp_init(adata->acp_base); 345 if (ret) { 346 dev_err(dev, "ACP init failed\n"); 347 return ret; 348 } 349 return 0; 350 } 351 352 static const struct dev_pm_ops rn_acp_pm = { 353 .runtime_suspend = snd_rn_acp_suspend, 354 .runtime_resume = snd_rn_acp_resume, 355 .suspend = snd_rn_acp_suspend, 356 .resume = snd_rn_acp_resume, 357 }; 358 359 static void snd_rn_acp_remove(struct pci_dev *pci) 360 { 361 struct acp_dev_data *adata; 362 int ret, index; 363 364 adata = pci_get_drvdata(pci); 365 for (index = 0; index < ACP_DEVS; index++) 366 platform_device_unregister(adata->pdev[index]); 367 ret = rn_acp_deinit(adata->acp_base); 368 if (ret) 369 dev_err(&pci->dev, "ACP de-init failed\n"); 370 pm_runtime_forbid(&pci->dev); 371 pm_runtime_get_noresume(&pci->dev); 372 pci_disable_msi(pci); 373 pci_release_regions(pci); 374 pci_disable_device(pci); 375 } 376 377 static const struct pci_device_id snd_rn_acp_ids[] = { 378 { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_DEVICE_ID), 379 .class = PCI_CLASS_MULTIMEDIA_OTHER << 8, 380 .class_mask = 0xffffff }, 381 { 0, }, 382 }; 383 MODULE_DEVICE_TABLE(pci, snd_rn_acp_ids); 384 385 static struct pci_driver rn_acp_driver = { 386 .name = KBUILD_MODNAME, 387 .id_table = snd_rn_acp_ids, 388 .probe = snd_rn_acp_probe, 389 .remove = snd_rn_acp_remove, 390 .driver = { 391 .pm = &rn_acp_pm, 392 } 393 }; 394 395 module_pci_driver(rn_acp_driver); 396 397 MODULE_AUTHOR("Vijendar.Mukunda@amd.com"); 398 MODULE_DESCRIPTION("AMD ACP Renoir PCI driver"); 399 MODULE_LICENSE("GPL v2"); 400